ADP7157ARDZ-03-R7

The ADP7157ARDZ-03-R7 is an adjustable linear regulator designed by Analog Devices for applications requiring high performance and low noise. It operates from an input voltage range of 2.3 V to 5.5 V and can provide a maximum load current of 1.2 A. The output voltage is adjustable, ranging from 1.2 V to 3.3 V.

Key electrical characteristics include ultralow noise performance, with typical output noise of 0.9 µV rms from 100 Hz to 100 kHz, and a noise spectral density of 1.7 nV/√Hz from 10 kHz to 1 MHz. It also boasts a high power supply rejection ratio (PSRR) of 82 dB from 1 kHz to 100 kHz. The device features a typical dropout voltage of 120 mV at 1.2 A load and 10 mA load.

Designed for noise-sensitive applications such as phase-locked loops (PLLs) and voltage controlled oscillators (VCOs), the ADP7157 is available in an 8-lead SOIC package with an exposed pad, offering excellent thermal performance. It requires only a 10 µF ceramic output capacitor for stability, contributing to a compact solution.

Additional features include precision enable control, over-current protection, and over-temperature protection. The typical operating supply current is 4.0 mA at no load and 7.0 mA at 1.2 A load, with a low shutdown current of 0.2 µA.